Abstract : Contents: International system of units in the practice of magnetic measurements; Expansion of the frequency limit of applicability of high-frequency permeameters; Investigation of apparatus for determining the magnetization curves of transformer steel in weak fields; A new highly sensitive ballistic method of testing ferromagnetic materials; Application of the quartz magnetometer for checking helmholtz coils; Electronic gaussmeter of the EG-1 Type, based on the use of the Hall effect.